981225

Appears in sequences

• Odd nonsquares k for which A161942(k) >= k, where A161942 is the odd part of sigma.at n=25A348743
• Expansion of e.g.f. exp( x^2/(2 * (1-x)^2) ) / (1-x).at n=8A361596
• Odd nondeficient numbers of the form p^(1+4k) * r^2, where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1.at n=25A386427